816613725 has 24 divisors (see below), whose sum is σ = 1351342080. Its totient is φ = 435137920.

The previous prime is 816613709. The next prime is 816613727. The reversal of 816613725 is 527316618.

It is not a de Polignac number, because 816613725 - 2⁴ = 816613709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816613727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 92452 + ... + 100898.

It is an arithmetic number, because the mean of its divisors is an integer number (56305920).

Almost surely, 2^816613725 is an apocalyptic number.

It is an amenable number.

816613725 is a deficient number, since it is larger than the sum of its proper divisors (534728355).

816613725 is a wasteful number, since it uses less digits than its factorization.

816613725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9749 (or 9744 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 816613725 is about 28576.4540312475. The cubic root of 816613725 is about 934.6999618759.

The spelling of 816613725 in words is "eight hundred sixteen million, six hundred thirteen thousand, seven hundred twenty-five".